A subsidiary of Hong Kong-based Sihuan Pharmaceutical Holdings Group Ltd. has filed a lawsuit against healthcare-dedicated investment firm CBC Group for allegedly infringing trade secrets, according to a Sihuan statement dated September 27. The Beijing Intellectual Property Court has accepted the case. Sihuan has exclusive distribution rights in China for Hyaluronic Acid and Letybo®100U, a type A botulinum toxin for injection, produced by Hugel, Inc., South Korea’s top botox maker. In August, a consortium led by CBC Group agreed to acquire a 47% stake in Hugel Inc. from Bain Capital for 1.7 trillion won ($1.5 billion). On Sep. 30, Sihuan stated that it did not expect its distribution rights for the two products to be affected by the Hugel acquisition.